A level math helppppppppp

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Reply 40

badoom1234

Original post by mqb2766

The equation of the line is ... Youve given two (incorrect) points (not P and Q) - but its largely irrelevant.

i've confused myself, I thought the equation the line was y= -10.5 but then how are there two values?

Reply 41

mqb2766

Original post by badoom1234

i've confused myself, I thought the equation the line was y= -10.5 but then how are there two values?

That is the correct equation of one line. y = -(6+2sqrt(5)) There is another similar line as the question asks for.
Your P point was incorrect for an obvious typo resason.

(edited 2 years ago)

Reply 42

badoom1234

Original post by mqb2766

That is the correct equation of one line. y = -(6+2sqrt(5)) There is another similar line as the question asks for.
Your P point was incorrect for an obvious typo resason.

ah okay so the other equation is -(6-2sqrt5))?

Reply 43

mqb2766

Original post by badoom1234

ah okay so the other equation is -(6-2sqrt5))?

Do you really need to ask?
But obviously yes.

Reply 44

badoom1234

Original post by mqb2766

Do you really need to ask?
But obviously yes.

im sorry if it seems like you're talking to a complete ****** I just needed to make sure ahah

Reply 45

mqb2766

Original post by badoom1234

im sorry if it seems like you're talking to a complete ****** I just needed to make sure ahah

Its not that, just with understanding the sketch there is an obvious symmetry in the solution about -6, which corresponds to the height of the triangle. Once you have that, its gcse pythagoras.